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Electron emitters for x-ray tubes and x-ray tubes having such electron emitters

An electron emitter and X-ray tube technology, applied in the field of X-ray tubes, can solve the problem of high heat load of electron emitters

Active Publication Date: 2016-06-08
SIEMENS HEALTHCARE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But this electron emitter has a high thermal load through the heating and cooling phases, so it has to be replaced after a short lifetime

Method used

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  • Electron emitters for x-ray tubes and x-ray tubes having such electron emitters
  • Electron emitters for x-ray tubes and x-ray tubes having such electron emitters
  • Electron emitters for x-ray tubes and x-ray tubes having such electron emitters

Examples

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Embodiment Construction

[0014] according to image 3 The X-ray tube 10 comprises a housing 12 in which an anode 14 and an electron emitter 16 are arranged opposite each other. Between the anode 14 and the electron emitter 16 there is a high voltage, by which electrons emitted from the electron emitter are accelerated towards the anode 14 and gamma rays are generated in the X-rays, which pass through the Window 18 is vented.

[0015] Figure 4 and Figure 5 An enlarged view of an x-ray emitter according to the invention is shown. The x-ray emitter comprises a flat, current-carrying conductor 20 whose conductor track 22 has a V-shaped meander. The meander is produced by a V-shaped notch or indentation 24 which starts at the edge 26 and is introduced into the strip by micromachining with laser or wire cutting and widens towards the edge 26 of the strip. The cutout 24 is correspondingly shaped such that its width a1 at the edge 26 is greater than at the inner base of the cutout. For example, the di...

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PUM

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Abstract

The invention relates to an electron emitter (16) for an X-ray tube (10) having a flat, energized conductor (20) for thermionic (e-) emission, the electron emitter (16) Has a V-shaped zigzag structure.

Description

technical field [0001] The invention relates to an electron emitter for an X-ray tube, which consists of a flat, energized conductor for thermionic emission. The invention also relates to an X-ray tube having such an electron emitter. Background technique [0002] For thermionic emission in X-ray tubes it is known, for example, from DE 27 27 907 C2 to use so-called flat emitters, which are made of strips of refractory material alternately provided with recesses introduced alternately on opposite sides Composition, therefore, of an energized strip conductor formed in this way has a meander-shaped structure. Such electron emitters known from the prior art are in the figure 1 and 2 In the form of top view or longitudinal section. The recesses or indentations 4 introduced into the thin strip 2 of thickness d, generally composed of tungsten W, are here rectangular and have a width a of approximately ten to several hundred micrometers. The distance between the notches 4 is de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J35/06H01J1/16
CPCH01J1/16H01J35/064
Inventor J.富尔斯特F.格思莱因M.索伊弗特
Owner SIEMENS HEALTHCARE GMBH